Hi Jerin,

-----Original Message-----
From: Jerin Jacob <redacted>
Sent: Monday, September 20, 2021 11:53 AM
To: Naga Harish K, S V <redacted>; Pavan Nikhilesh
[off-list ref]; mattias.ronnblom
[off-list ref]
Cc: Jerin Jacob <redacted>; Jayatheerthan, Jay
[off-list ref]; dpdk-dev [off-list ref]
Subject: Re: [dpdk-dev] [PATCH v1 3/5] eventdev:rx_adapter:add per queue
event buffer configure support

On Sat, Sep 18, 2021 at 6:42 PM Naga Harish K S V
[off-list ref] wrote:

quoted

To configure per queue event buffer size, applications sets
``rte_event_eth_rx_adapter_params::use_queue_event_buf`` flag as true
and is passed to `rte_event_eth_rx_adapter_create2` api.

The per queue event buffer size is populated  in
``rte_event_eth_rx_adapter_queue_conf::event_buf_size`` and passed to
``rte_event_eth_rx_adapter_queue_add``.

Signed-off-by: Naga Harish K S V <redacted>

Please change the subject to
eventdev/rx_adapter: ...

It is updated in latest patch set.

rest looks good to me.

quoted

---
 .../prog_guide/event_ethernet_rx_adapter.rst  | 19 ++++++++++++-------
 lib/eventdev/rte_event_eth_rx_adapter.h       |  4 ++++
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst

b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
index cbf694c66b..55d09dbcb8 100644

--- a/doc/guides/prog_guide/event_ethernet_rx_adapter.rst
+++ b/doc/guides/prog_guide/event_ethernet_rx_adapter.rst

@@ -62,12 +62,14 @@ service function and needs to create an event port

for it. The callback is  expected to fill the ``struct
rte_event_eth_rx_adapter_conf structure``  passed to it.

-If the application desires to control the event buffer size, it can
use the -``rte_event_eth_rx_adapter_create2()`` api. The event buffer
size is -specified using ``struct

rte_event_eth_rx_adapter_params::event_buf_size``.

quoted

-The function is passed the event device to be associated with the
adapter -and port configuration for the adapter to setup an event port
if the -adapter needs to use a service function.
+If the application desires to control the event buffer size at
+adapter level, it can use the ``rte_event_eth_rx_adapter_create2()``
+api. The event buffer size is specified using ``struct

rte_event_eth_rx_adapter_params::event_buf_size``.

quoted

+To configure the event buffer size at queue level, the boolean flag
+``struct rte_event_eth_rx_adapter_params::use_queue_event_buf``

need

quoted

+to be set to true. The function is passed the event device to be
+associated with the adapter and port configuration for the adapter to
+setup an event port if the adapter needs to use a service function.

 Adding Rx Queues to the Adapter Instance
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

@@ -79,7 +81,9 @@ parameter. Event information for packets from this

Rx queue is encoded in the  ``ev`` field of ``struct
rte_event_eth_rx_adapter_queue_conf``. The  servicing_weight member

of

quoted

the struct  rte_event_eth_rx_adapter_queue_conf
 is the relative polling frequency of the Rx queue and is applicable
when the -adapter uses a service core function.
+adapter uses a service core function. The applications can configure
+queue event buffer size in ``struct
+rte_event_eth_rx_adapter_queue_conf::event_buf_size``
+parameter.

 .. code-block:: c

@@ -90,6 +94,7 @@ adapter uses a service core function.
         queue_config.rx_queue_flags = 0;
         queue_config.ev = ev;
         queue_config.servicing_weight = 1;
+       queue_config.event_buf_size = 1024;

         err = rte_event_eth_rx_adapter_queue_add(id,
                                                 eth_dev_id, diff
--git a/lib/eventdev/rte_event_eth_rx_adapter.h

b/lib/eventdev/rte_event_eth_rx_adapter.h
index a1b5e0ed37..f9e63dc126 100644

--- a/lib/eventdev/rte_event_eth_rx_adapter.h
+++ b/lib/eventdev/rte_event_eth_rx_adapter.h

@@ -199,6 +199,8 @@ struct rte_event_eth_rx_adapter_queue_conf {
         * Valid when RTE_EVENT_ETH_RX_ADAPTER_QUEUE_EVENT_VECTOR

flag is set in

quoted

         * @see rte_event_eth_rx_adapter_queue_conf::rx_queue_flags.
         */
+       uint16_t event_buf_size;
+       /**< event buffer size for this queue */
 };

 /**

@@ -263,6 +265,8 @@ struct rte_event_eth_rx_adapter_vector_limits {

struct rte_event_eth_rx_adapter_params {
        uint16_t event_buf_size;
        /**< size of event buffer for the adapter */
+       bool use_queue_event_buf;
+       /**< flag to indicate that event buffer is separate for each
+ queue */
 };

 /**
--
2.25.1

Regards
Harish